Go to a motorcycle shop and buy a can of Maxima chainwax chainlube or a similar chainwax that dries hard. Spray it wherever you don't want rust. Let it dry. Wrap in in 4 mill plastic. Store it on blocks of wood on it's side. Try to keep the sun off of it. It will be good for years. I would bet the chainwax alone would work for 2 years outside. I had a FJ40 block that kicked around my shop for years inside and out until the plastic was brittle and blowing away. Opened up what was left of the plastic and the bores were like new.